Coordination CompoundHard

Question

The complex [Fe(H2O)5NO]2+ is formed in the brown ring test for nitrates when freshly prepared FeSO4 solution is added to aqueous solution of NO3- ions followed by addition of conc. H2SO4. Select correct statement about this complex.

Options

A.Hybridisation of iron is sp3d2.
B.Iron has +1 oxidation state.
C.It has magnetic moment of 3.87 b. M. confirming three unpaired electrons in Fe.
D.All the above are correct statements.

Solution

[Fe(I) (H2O)5 NO+]
                                                Three unpaired electrons
                                                six - sp3d2 hybrid orbital
                                                So m = 3.87.

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